A body 73 and up vs 72 and older front track width questions.

Yup, the later brakes add 3/4" per side.
You'll either need more backspace on your front wheels or a shorter tire.
Since it just barely nicks the fender at full lock, you could also try adding some fender braces (or extending your existing ones) to push the lower edge out another 1/2" or so- some A bodies had them, some didn't. I don't believe the Barracudas did.